<?php

$ranges = array(1744830464 => array(1746927615, 'US'), 1745879040 => array(1747189759, 'US'), 1747189760 => array(1749024767, 'ZZ'), 1749024768 => array(1753219071, 'US'), 1753219072 => array(1761607679, 'ZZ'));